Answer:
Total length of the biking trail is 14 units
Explanation:
The trail starts from point P(-3, 2) and touches points Q(1, 2), R(1, -1) and S(8, -1).
We have to calculate the total length of the biking trail.
Since distance between two points are represented by
d =

So length of PQ =

PQ =
PQ = 4 units
QR =

QR =

QR = 3 units
RS =

RS =

RS = 7 units
Now total biking trail = PQ + QR + RS
= 4 + 3 + 7
= 14 units
Total length of the biking trail is 14 units